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Philip Klotzbach

@philklotzbach64k followers

Meteorologist at CSU specializing in Atlantic basin seasonal hurricane forecasts. Avid runner, cyclist and hiker. Appalachian Trail thru-hiker in 2002.

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1Sep 3, '24The Atlantic has had no named storm formations since #Ernesto on August 12. The last time that the Atlantic had no named storm formations between August 13 - September 3 was in 19632.9×749k1.3k40993
2Oct 6, '24For the first time on record, the Atlantic has 3 #hurricanes simultaneously after September (#Kirk, #Leslie, #Milton).27.1×617k2.9k1k264
3Aug 28, '23#Franklin's central pressure is down to 926 hPa - the lowest central pressure for a #hurricane this far north (29°N) in the open Atlantic (e.g., not Gulf of Mexico) on record. Atla14.6×333k1.3k42835
4Apr 4, '24Atlantic seasonal #hurricane forecast from @ColoradoStateU calls for very active season: 23 named storms, 11 hurricanes & 5 major hurricanes. Extremely warm tropical Atlantic a14.6×332k65937545
5Jun 29, '24#Beryl is now a #hurricane - the farthest east that a hurricane has formed in the tropical Atlantic (<=23.5°N) in June on record, breaking the old record set in 1933.14.3×327k1.3k64963
6Oct 25, '23#Hurricane #Otis has intensified by 80 mph in the past 12 hours (from 65 mph to 145 mph). That's the fastest 12 hr intensification rate in the eastern North Pacific (to 180°) in th13.6×309k1.4k56646
7Sep 7, '17#Irma has now had winds of 185 mph for 33 hrs - no other TC around the globe has been this strong for so long in satellite era (since 1966).12.5×03.6k3.7k0
8Sep 27, '24#Hurricane #Helene has made landfall in the Big Bend of Florida as a Category 4 with max winds of 140 mph - the strongest hurricane to make landfall in the Big Bend of Florida on r11.6×263k1.3k538121
9Sep 3, '24So what the heck is happening with the Atlantic #hurricane season, and is this going to be an enormous forecast bust? CSU will post an updated extensive discussion on its website b11.4×259k925155105
10Jul 2, '24One reason why #Hurricane #Beryl intensified to a Category 5 hurricane over two weeks earlier than any other Atlantic Cat. 5 on record is due to extremely high ocean heat content l11.4×259k1.3k562105
11Sep 26, '24#Hurricane #Helene is now a Category 4 hurricane with max winds of 130 mph. If it maintains that intensity until landfall, it would be the first Cat. 4+ hurricane on record to make11.3×258k1.4k46495
12May 15, '24Today's ocean heat content in the Atlantic Main Development Region for #hurricanes is typically reached on August 1st. We're currently running about 2.5 months ahead of schedule.11.1×253k76031473
13Jul 4, '24For the first time in the satellite era (1966-onwards), the entire North Pacific (e.g., western North Pacific, central North Pacific, eastern North Pacific) has had no named storm 10.3×235k80429292
14Sep 6, '17The Atlantic now has 3 hurricanes active at the same time: #Irma, #Jose and #Katia. The last time this occurred was September 16-17, 2010.10.3×02.6k3k1
15Oct 7, '24#Milton is now a Category 5 #hurricane with max winds of 160 mph. Milton joins Michael as the only October Category 5 hurricanes in the Gulf of Mexico in the satellite era (1966-on9.9×226k92339058
16Aug 30, '23For the first time since 1950, the Atlantic has two 110+ mph #hurricanes in August simultaneously (#Franklin and #Idalia).9.8×223k1.4k60745
17Jun 30, '24#Hurricane #Beryl is now a Category 4 hurricane with max winds of 130 mph - the earliest calendar year Atlantic Category 4 hurricane on record. Old Atlantic record for earliest Cat8.3×190k91443437
18Jul 9, '24Colorado State University has increased forecast & calls for extremely active 2024 Atlantic #hurricane season with 25 named storms (including Alberto, #Beryl, Chris), 12 hurric8.1×185k55328257
19Jul 2, '24#Hurricane #Beryl has intensified to a Category 5 hurricane with max winds of 160 mph - the earliest calendar year Atlantic Category 5 hurricane on record. The prior record was Hur7.9×181k1.1k46453
20Jun 19, '23#Bret has formed in the central tropical Atlantic - the farthest east that a tropical storm has formed in the tropical Atlantic (south of 23.5°N) this early in the calendar year on7.4×169k98634920
21Oct 8, '24#Milton's pressure has fallen to 897 hPa - the lowest pressure in an Atlantic #hurricane since Wilma in 2005 (882 hPa).7.3×167k95429873
22Sep 4, '24CSU has issued an extensive discussion of the 2024 Atlantic #hurricane season to date, including some reasons behind the recent quiet period.7.3×167k626194119
23Oct 3, '24#Kirk is now a Category 4 #hurricane with max winds of 130 mph while at ~47°W. This shatters the record for farthest east an Atlantic Category 4-5 hurricane has occurred in October7.1×161k53519428
24Jun 30, '24#Hurricane #Beryl is now a major, Category 3 hurricane with max winds of 115 mph - the first June major hurricane east of the Lesser Antilles on record.6.5×148k75631333
25Aug 28, '23#Franklin and #Idalia are forecast to be major #hurricanes at the same time on Wednesday. If that verifies, it will be only the 3rd year on record (since 1851) where the Atlantic h5.7×130k68927327
26Sep 9, '17#Irma has officially made landfall in Cuba as a Cat. 5 - the 1st Cat. 5 hurricane to make landfall in Cuba since 1924.5.7×01.3k1.9k1
27May 20, '24The Northern Hemisphere has yet to have its first named storm (e.g., tropical storm or #hurricane) in 2024. This is the first time since 1983 that the Northern Hemisphere has gone 5.6×127k60019938
28Sep 8, '17#Harvey, #Irma and #Jose all reached Cat. 4+ status - 1st time on record 3 consecutive Atlantic named storms have reached Cat. 4+5.5×01.3k1.7k1
29Jun 8, '23NOAA has officially declared that #ElNino is underway. They've recently published a great blog:5.2×118k70428835
30Jun 23, '23For the first time since 1968, the Atlantic has two named storms in June simultaneously. #Bret #Cindy4.9×111k75134718
31Sep 5, '17Table of all 17 Atlantic #hurricanes w/ max winds >=175 mph during their lifetime. #Irma4.8×01.7k1.2k0
32Oct 7, '24#Milton continues to rapidly intensify and now has max winds of 175 mph - the strongest Gulf of Mexico #hurricane since Rita (2005).4.5×102k55421726
33Sep 8, '172 Atlantic hurricanes currently have winds of 150 mph (#Irma and #Jose) - 1st time on record Atlantic has had 2 150+ mph storms at same time4.4×01k1.3k0
34Jul 2, '24#Hurricane #Beryl currently is a Category 5 w/ max winds of 165 mph - the strongest July Atlantic hurricane on record, breaking old record of 160 mph set by Emily (2005). Prior rec4.4×100k61927124
35Sep 4, '19The Atlantic currently has three named storms (#Dorian, #Fernand and #Gabrielle). This is the 4th year in a row that we have had 3+ named storms simultaneously at some point during4.4×01.8k1k23
36Aug 5, '24#Hurricane #Debby has made landfall near Steinhatchee, FL with max winds of 80 mph. Debby is the 4th hurricane to make landfall in Florida in August since 2000. The other three are4.2×96k54421725
37Oct 6, '24#Milton is now a #hurricane - the 9th of the 2024 season and the 5th to form since September 25. This is the most Atlantic hurricane formations on record between September 25 - Oct4.2×95k60823940
38Sep 17, '23Tropical Storm #Nigel has formed in the central tropical Atlantic - the 10th named storm to form in the Atlantic since August 20. That's the most named storms on record to form in 4.1×94k5081898
39Jun 29, '24Tropical Storm #Beryl has strengthened and now has max winds of 60 mph. Beryl is the strongest June tropical storm this far east (~47°W) in the tropical Atlantic (<23.5°N) on re4.1×93k58123319
40Oct 10, '24#Hurricane #Milton has made landfall near Siesta Key, FL - the 5th US Gulf Coast hurricane landfall this year (Beryl, Debby, Francine and Helene are other 4). This ties 2005 and 203.8×87k55122342
41Sep 5, '17#Irma is now a Cat. 5 hurricane with max winds of 175 mph - the strongest Atlantic hurricane since Felix (2007).3.7×07901.1k0
42Oct 7, '24#Milton has max winds of 180 mph. Only 2 other #hurricanes in the Gulf of Mexico have had max winds of 180+ mph since 1950: Allen (1980) and Rita (2005).3.7×84k58825138
43Jun 22, '23Supercell time lapse from our house in Highlands Ranch a few minutes ago. Large tornado on the ground just north of here. Currently hanging out in the basement3.7×83k5528422
44Aug 26, '20#Laura has rapidly intensified & now forecast to reach Category 4 #hurricane intensity. Since 1950, there have been 7 August Category 4+ hurricanes in the Gulf of Mexico: Camil3.6×01.3k78040
45Jul 1, '24#Hurricane #Beryl's pressure has fallen to 944 hPa - the lowest by a hurricane in the eastern Caribbean (8-20°N, 75-60°W) since Hurricane Maria (2017). Lower pressure = stronger st3.4×79k85525842
46Aug 30, '22For the first time since 1941, the Atlantic has had no named storm (e.g., tropical storm or #hurricane) activity from July 3rd-August 30th.3.3×01.5k53432
47Sep 27, '24#Helene’s pressure has dropped to 941 hPa as it approaches the Big Bend. 941 hPa was the landfall pressure of #Hurricane Ian (2022). Lower pressure = stronger hurricane.3.0×68k54414921
48Sep 19, '17#Maria is about to make landfall in Dominica as Cat. 5 - first Cat. 5 to make landfall (or track within ~100 miles) of Dominica on record.2.9×08568140
49Jun 22, '23Tropical Depression 4 has formed and is forecast to become #Cindy by tomorrow. If it does, it would be 2nd storm (#Bret already formed) to form in tropical Atlantic (south of 23.5N2.9×65k56119411
50Jul 1, '24#Hurricane #Beryl continues to strengthen and how has max winds of 155 mph - the earliest Atlantic calendar year hurricane this strong on record. The only other July hurricane with2.9×65k53218524
51Sep 5, '17Strongest hurricane on record in satellite era (since 1966) to hit Leeward Islands is David (1979) at 160 mph. #Irma now has 175 mph winds.2.8×05118720
52Aug 26, '20#Laura continues to strengthen and is now a Category 4 #hurricane with max winds of 140 mph. Laura is now the strongest August hurricane in the Gulf of Mexico since Katrina (2005).2.7×098261121
53Sep 8, '17The Atlantic has generated more Accumulated Cyclone Energy today than any other day on record. Old record was 9/11/1961. #Irma #Jose #Katia2.5×07686941
54Sep 6, '17#Irma has now had max winds of 180+ mph for past 24 hrs - an Atlantic hurricane record. Old record was Allen w/ 18 hours of 180+ mph winds2.4×06777391
55Sep 5, '17#Irma has now surpassed Luis (1995) as the leading Accumulated Cyclone Energy generator in the tropical Atlantic (10-20N, 60-20W) on record.2.4×06575230
56Aug 5, '20Seasonal forecast from @ColoradoStateU increased & now calls for extremely active 2020 Atlantic #hurricane season: 24 named storms (including 9 that have already formed), 12 hu2.3×062438812
57Oct 14, '17#Ophelia is now a major hurricane - the farthest east (26.6°W) an Atlantic major hurricane has existed on record.2.2×05866270
58Sep 2, '19Over the last 12 hours, #HurricaneDorian has traveled only ~40 miles (~3.3 miles per hour) across Grand Bahama island. It is now moving west at only 1 mph. The long-duration impact2.1×091946314
59Aug 29, '18Thirteen years ago today, Hurricane Katrina made landfall in Louisiana as a Category 3 hurricane. ~1500 fatalities and over $100 billion dollars in damage.2.1×06595666
60Jun 21, '23Quite an impressive African easterly wave train for June 21st!2.0×46k521849
61Sep 5, '17#Irma is the 17th hurricane in the Atlantic on record to have max winds >= 175 mph. Atlantic max wind record is Allen (1980) at 190 mph.2.0×06305500
62Aug 29, '21#Hurricane #Ida's pressure is down to 935 hPa. Only two #hurricanes on record have made landfall in Louisiana with a pressure this low: Katrina (2005, 920 hPa) and Last Island (1852.0×082242626
63Aug 26, '20#Laura's maximum sustained winds have increased from 75 mph to 125 mph in the past 24 hr. That's the largest 24-hr rate of intensification (50 mph in 24 hr) for a tropical cyclone 2.0×085239924
64Sep 5, '173 hurricanes in satellite era (since 1966) have hit Leeward Islands at >=150 mph - the current intensity of Irma: David, Hugo, & Lenny.2.0×08084980
65Sep 28, '22#HurricaneIan has rapidly intensified overnight & now has maximum sustained winds of 155 mph. Only 4 #hurricanes on record have made continental US landfall w/ max winds of 1552.0×077543734
66Sep 14, '20For the 2nd time on record, the Atlantic has 5+ tropical cyclones (tropical depression (TD) or stronger) simultaneously: #Hurricane #Paulette, TD #Rene, Tropical Storm #Sally, Trop2.0×066146618
67Sep 5, '17#Irma has now generated more Accumulated Cyclone Energy during her lifetime than did Hurricane Katrina (2005).1.9×05205480
68Apr 8, '21Atlantic seasonal #hurricane forecast from @ColoradoStateU calls for above-average season: 17 named storms, 8 hurricanes & 4 major hurricanes. Reasons for above-average forecas1.9×05974187
69Sep 5, '19#HurricaneDorian has now been a named storm for 12 days - the 15th named storm forming in August to last 12 or more days in the satellite era (since 1966).1.9×082538618
70Aug 27, '20Map showing all Category 4-5 #hurricane landfalls in the continental US on record (since 1851). #HurricaneLaura’s landfall in SW Louisiana is the lone Category 4-5 in that part of 1.8×084435043
71Oct 10, '18#Hurricane #Michael's pressure continues to drop - now to 923 hPa. Only 4 hurricanes on record have hit the continental US with a lower pressure: Labor Day (1935), Camille (1969), 1.8×04975201
72Oct 6, '20#Delta has intensified by 70 mph (from 40 mph to 110 mph) in its first 24 hours since becoming a named storm. This is the most intensification in a 24 hour period for an October At1.8×073340312
73Aug 29, '20Fifteen years ago today, #Hurricane #Katrina made landfall in Louisiana and then in Mississippi as a Category 3 hurricane. ~1500 fatalities and over $100 billion dollars in damage 1.8×070939714
74Sep 22, '22#Fiona's central pressure is down to 932 hPa - the lowest pressure for a #hurricane this far north (30.8°N) in the open Atlantic (e.g., excluding the Gulf of Mexico) in the satelli1.8×088933118
75May 23, '19For the first time since the US Drought Monitor began in 2000, none of the continental US is in severe #drought.1.7×073636211
76Aug 26, '209 #hurricanes on record (since 1851) made landfall in continental US with 150mph+ max wind intensity (#Laura's current intensity-150mph): Last Island(1856), Indianola(1886), FL Key1.7×059840127
77Jul 2, '21#Elsa is now a #hurricane - the first of the 2021 Atlantic hurricane season to date. The 1991-2020 average date for the first Atlantic hurricane formation is 14 August.1.7×070234810
78Aug 26, '20#HurricaneLaura has continued to intensify and now has maximum winds of 150 mph. Only one #hurricane on record (since 1851) has made landfall in Louisiana with max winds that stron1.7×061635414
79Aug 23, '17It has been 3266 days since the last hurricane made landfall in Texas (Ike-2008). #Harvey1.6×05554370
80Aug 26, '20#HurricaneLaura's maximum winds have increased by 65 mph in 24 hours (from 75 mph to 140 mph). That's the fastest 24-hr wind intensification for an Atlantic tropical cyclone since 1.6×06503375
81Aug 29, '19#HurricaneDorian is now forecast to be a Category 4 #hurricane when it approaches the east coast of Florida. Since 1900, 8 Category 4-5 hurricanes have made landfall along the east1.6×05673458
82Sep 4, '19#HurricaneDorian has now generated more Accumulated Cyclone Energy than 9 full Atlantic #hurricane seasons since 1950: 1972, 1977, 1982, 1983, 1986, 1987, 1991, 1994 and 2013.1.6×063533517
83Aug 27, '20#Laura’s central pressure is down to 937 hPa. Only 3 #hurricanes on record (since 1851) have made landfall in Louisiana with a central pressure of <=937 hPa: Katrina (2005, 920 1.5×05983629
84Sep 27, '22#Ian's central pressure has dropped to 947 mb - the lowest pressure for a September #hurricane in the Gulf of Mexico since Irma (2017).1.5×071928417
85Aug 27, '20#HurricaneLaura has made landfall near Cameron, LA with max winds of 150 mph - the strongest #hurricane to make landfall in Louisiana since the Last Island Hurricane of 1856 (also 1.4×052735115
86Nov 16, '20For the first time on record, the Atlantic has had two major #hurricane formations in November. #Iota just became a major hurricane. Eta was a major hurricane earlier this month.1.4×062327014
87Aug 23, '22For the first time since 1982, the Atlantic has had no named storms (e.g., >=39 mph tropical cyclones) between July 3 - August 22. #hurricane1.4×059424114
88Sep 1, '19Only six Atlantic #hurricanes since 1950 have had stronger winds than #HurricaneDorian's current max winds of 175 mph: Allen (1980), Gilbert (1988), Mitch (1998), Rita (2005), Wilm1.3×05093328
89Jun 6, '2177 years ago today, one of the greatest weather forecasts of all-time verified - a break in the weather necessary for the #DDay invasion. #DDay20211.3×07312129
90Nov 16, '20Just how strong is Category 5 Hurricane #Iota? Its current central pressure of 917 mb is lower than Hurricane Katrina’s central pressure at the time of its strongest Gulf Coast lan1.2×05762318
91Nov 3, '20#Eta is forecast to become a Category 5 #hurricane before landfall in Nicaragua. If that forecast verifies, it would be only the 2nd Atlantic Category 5 hurricane in November on re1.2×054723411
92Sep 29, '19Location of where all Atlantic Category 5 #hurricanes first reached Category 5 strength. #Lorenzo is highlighted in blue.1.2×051327611
93Oct 28, '20#Zeta is now a Category 2 #hurricane with max winds of 100 mph - the latest Category 2+ hurricane in the western Gulf of Mexico (west of 90°W) on record.1.2×06752063
94Nov 10, '21For the first time on record (since 1950), the globe has had no major (Category 3+; >=111 mph winds) #hurricane/#typhoon formations from September 26 - November 10.1.2×056519914
95Sep 4, '21#Larry is now a major #hurricane - the 3rd of 2021 Atlantic hurricane season (Grace and Ida were already major hurricanes). Only 3 years in satellite era (since 1966) have had 3 At1.2×05802208
96Sep 27, '19#Lorenzo now has max winds of 145 mph - the strongest #hurricane east of 45°W in the Atlantic on record.1.1×05042365
97Oct 31, '19Tracks of all 1081 named storms in the Atlantic basin since Washington last won the World Series in 1924. Congratulations #Nats! #hurricane1.0×054116810
98Oct 1, '21#Hurricane #Sam has intensified and now has max winds of 150 mph - the strongest hurricane this far east in the Atlantic (~62°W) this late in the calendar year on record.1.0×05471598
99Jun 6, '2278 years ago today, one of the greatest weather forecasts of all-time verified - a break in the weather necessary for the #DDay invasion. #DDay20220.9×05311387
100Sep 29, '1817 seconds of Swiss hiking happiness.0.8×0542894

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