Debby dumps 20 inches of rain; 105° in Denver: hottest day on record

By: Dr. Jeff Masters , 11:52 AM GMT on June 26, 2012

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Florida, the Sunshine State, continues to be the thoroughly sodden state, thanks to torrential rains from slow-moving Tropical Storm Debby. On Monday, Debby spawned an area of intense thunderstorms that blew up over the Florida Panhandle, just east of Apalachicola. A weather station in Wakulia County, 4 miles east of Saint Marks, Florida, recorded 12.99" on rain in just 12 hours, bringing the 48-hour rainfall total at the site to 20.96". Several other stations in Wakulia Country also recorded rainfall amounts in excess of 20 inches, and the heavy rains caused moderate to major flooding on area rivers. Debby did not spawn any tornadoes on Monday, thankfully.


Figure 1. Radar-estimated rainfall from Tropical Storm Debby shows an area of extreme rainfall in excess of 15 inches has affected the Florida Panhandle.

Dry air and high wind shear continue to disrupt Debby. Our Wundermap for the surrounding ocean areas shows that winds at almost all buoys and coastal stations along the Gulf Coast were below 25 mph at 7 am EDT. Visible satellite loops show Debby has virtually no heavy thunderstorms near its center of circulation, which will severely limit its potential for intensification. The heavy thunderstorms of Debby are mostly on the east and north sides. Upper-level winds out of the west creating a high 20 - 25 knots of wind shear that continues to drive dry air into Debby's core. This dry air can be seen on Water vapor satellite loops. Ocean temperatures are about 27.5°C (81°F) in the Northern Gulf of Mexico, which is about 1°F above average, but these waters do not extend to great depth, which will limit how strong Debby can get.


Figure 2. True-color visible Terra satellite image of Debby taken at 12:30 pm EDT Monday June 25, 2012. At the time, Debby had top winds of 45mph. Note the heavy thunderstorms on the north side of the center, which were dumping extremely heavy rains over the Florida Panhandle that caused major flooding on area rivers. Image credit: NASA.

Forecast for Debby
Debby's slow motion will make rainfall the primary threat from the storm, though tornadoes will continue to be a threat over the next few days. NOAA's Storm Prediction Center has placed most of Florida in its "Slight Risk" area for severe weather today. The slow motion of Debby will inhibit intensification of the storm by stirring up cooler waters from the depths to the surface. Debby's close proximity to land places a portion of its circulation over land, which will also tend to slow down intensification. Wind shear is expected to remain in the high range through Wednesday, and given the storm's other problems, significant intensification before landfall on Florida's Gulf Coast is unlikely.

Denver's 105°: hottest temperature in city history
The mercury soared to 105° in Denver, Colorado on Monday, tying the record for the hottest temperature ever measured in the city. The city also hit 105° on July 20, 2005 and August 8, 1878. Yesterday's 105° reading was the city's fourth consecutive day in the triple digit heat. The city's record streak of 100°+ days is five, set in 1989 and again in 2005. Denver's forecast today calls for highs of 100 - 104°, so the city will likely tie its all-time mark for consecutive 100°+ days.

In many respects, the extreme heat that has scorched Colorado since Saturday is the state's most intense heat wave in recorded history. According to wunderground's weather historian Christopher C. Burt, Saturday's 114° reading in Las Animas tied for the hottest temperature ever measured in the state of Colorado. Two other 114° readings have occurred in Colorado history: in Las Animas on July 1, 1933, and in Sedgwick on July 11, 1954. Colorado Springs tied its all-time record for warmest temperature ever measured on both Saturday and Sunday, with readings of 100°. The record heat in Colorado has exacerbated numerous destructive wildfires, and the Governor reported over the weekend that half of the nation's firefighting fleet has been deployed to Colorado. On Sunday, a wildfire that grew to more than 3 square miles near Colorado Springs drove 11,000 residents (2% of the city's population) out of their homes. In Fort Collins, the mercury hit 102° on Sunday, just 1° below the city's all-time hottest temperature of 103° set on Jul 21, 2005. The heat did no favors for firefighters struggling to the contain the massive 81,000 acre High Park fire fifteen miles northwest of Fort Collins. The fire is the second largest and most destructive wildfire in Colorado's history, and is 45% contained. La Junta, CO hit 110° on Sunday, tying its all-time hottest temperature record, set on June 28, 1990. Today is the last day of exceptional heat for Colorado, as the ridge of high pressure responsible slides to the east, bringing record-breaking heat to the Midwest instead.

Jeff Masters

One of Debbie's tornados (whgator3)
Tornado crossing Lk. Winterset in Winter Haven, Fl 6/24 8pm
One of Debbie's tornados
TS Debbie on Bayshore (robb04047)
Waves crashing on Bayshore Blvd.
TS Debbie on Bayshore

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Quoting luvtogolf:
So did the Tampa shields fail because of the extreme rainfall or do the shields only apply to hurricane force winds?
no the shields held, no hurricane came in..lol
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting Tropicsweatherpr:


Good afternoon nigel. The Euro develops at EPAC and this is day 10. GFS develops on longer range.


Thanks for the info, Tropics. What is the weather like in Puerto Rico at the moment?
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Deleted
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Quoting Slamguitar:
Is Debby ahead of Chris in ACE yet? She's been a TS for a while now.
Year-to-date:

CHRIS: 2.7675
DEBBY: 2.3225
BERYL: 2.1600
ALBERTO: 1.3750

ACE

Of course, if the NHC maintains Debby as a tropical storm at 5, her ACE will go up a bit. But at Debby's present strength, it would take another 24 hours to overtake Chris.
Member Since: November 8, 2009 Posts: 4 Comments: 13805
The National Weather Service in League City has issued a

* Severe Thunderstorm Warning for...
northern Fort Bend County in southeast Texas...
western Harris County in southeast Texas...
southeastern Waller County in southeast Texas...

* until 415 PM CDT

* at 322 PM CDT... National Weather Service Doppler radar indicated a
severe thunderstorm capable of producing penny size hail... and
damaging winds in excess of 60 mph. This storm was located 12
miles northeast of Katy... or 7 miles west of Jersey Village... and
moving southwest at 20 mph.

* Locations in the Severe Thunderstorm Warning include but are not
limited to Brookshire.
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Quoting Tropicsweatherpr:


Good afternoon nigel. The Euro develops at EPAC and this is day 10. GFS develops on longer range.

yes something to watch for in the coming days..i truly hope if it does form..it goes to texas, they NEED it and we for sure dont
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting floridafisherman:
ive been a member here for a long time but dont post often. i did want to comment on Debbie though. i live in lehigh acres, about 10 miles east of ft myers and ive been through alot of storms here...ernesto, charlie, wilma, fay, jeanne being some of them. i just cant believe how windy it has gotten over the last day here. it seems as the further away and weaker debbie is getting, the stronger the winds have been getting. we have been getting alot of benifitial rain here, luckily its been mostly spread out with the exceptions of the heavier stuff when we got the feeder bands and squall lines. there is some coastal flooding and some severe erosion on the barrier islands here and when going over the caloosahatchee river this morning, the tide was very high, practically flooding. i cant imagine the flooding further north.

anyhow, i must say this storm has been full of surprises. and it should be a loud wakeup call for those who think lightly of tropical systems. if a minimal tropical storm can conjure up this much destruction, imagine what a much stronger storm meandering in the gulf can do. the people around tampa should especially take heed. this storm showed the vulnerability of the highway system. closed bridges and expressways limits access and more importantly, evacuation routes.


The wind field is reminiscent of a subtropical cyclone with strongest winds far removed from the center. However, there is no indication that it is subtropical. It just has a really strange wind field. Also bear in mind, as I mentioned earlier.... there has been more sun to the southeast of the storm (thanks to dry air entrainment), therefore it is allowing the stronger winds just off the surface to mix down.
Member Since: March 19, 2010 Posts: 0 Comments: 1147
tx floridafisherman...you are so right! Just with the wind here in orange city fl we have had trees down.
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Rain!?

The National Weather Service has issued Severe Thunderstorm Watch
432 in effect until 10 PM CDT this evening for the following
areas

In southeast Texas this watch includes 10 counties

Austin Brazos Burleson
Colorado Fort Bend Grimes
Jackson Waller Washington
Wharton

This includes the cities of... Bellville... Brenham... Brookshire...
Bryan... Caldwell... College Station... Columbus... Eagle Lake...
Edna... El Campo... Hempstead... Lake Somerville... Missouri City...
Navasota... Pierce... Prairie View... Richmond... Rosenberg... Sealy...
Sugar Land... Weimar and Wharton.
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Quoting Slamguitar:
Is Debby ahead of Chris in ACE yet? She's been a TS for a while now.


Not yet but almost is reaching Chris.


03L (Chris)

Operational

2.7200



04L (Debby)

Operational

2.3225
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Deleted
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Very wind heavy watch, about what I expected.



WWUS40 KWNS 262024
WWP2

SEVERE THUNDERSTORM WATCH PROBABILITIES FOR WS 0432
NWS STORM PREDICTION CENTER NORMAN OK
0324 PM CDT TUE JUN 26 2012

WS 0432
PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES : 10%
PROB OF 1 OR MORE STRONG /F2-F5/ TORNADOES : <02%
PROB OF 10 OR MORE SEVERE WIND EVENTS : 50%
PROB OF 1 OR MORE WIND EVENTS >= 65 KNOTS : 10%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : 30%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 20%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 70%

&&
ATTRIBUTE TABLE:
MAX HAIL /INCHES/ : 2.0
MAX WIND GUSTS SURFACE /KNOTS/ : 60
MAX TOPS /X 100 FEET/ : 550
MEAN STORM MOTION VECTOR /DEGREES AND KNOTS/ : 05025
PARTICULARLY DANGEROUS SITUATION : NO

&&
FOR A COMPLETE GEOGRAPHICAL DEPICTION OF THE WATCH AND
WATCH EXPIRATION INFORMATION SEE WOUS64 FOR WOU2.

$$
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Quoting nigel20:

Hey Largo...I'm not seeing much on satellite, but I'm not sure if the models are predicting development in that area.


Good afternoon nigel. The Euro develops at EPAC and this is day 10. GFS develops on longer range.

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So did the Tampa shields fail because of the extreme rainfall or do the shields only apply to hurricane force winds?
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Is Debby ahead of Chris in ACE yet? She's been a TS for a while now.
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ive been a member here for a long time but dont post often. i did want to comment on Debbie though. i live in lehigh acres, about 10 miles east of ft myers and ive been through alot of storms here...ernesto, charlie, wilma, fay, jeanne being some of them. i just cant believe how windy it has gotten over the last day here. it seems as the further away and weaker debbie is getting, the stronger the winds have been getting. we have been getting alot of benifitial rain here, luckily its been mostly spread out with the exceptions of the heavier stuff when we got the feeder bands and squall lines. there is some coastal flooding and some severe erosion on the barrier islands here and when going over the caloosahatchee river this morning, the tide was very high, practically flooding. i cant imagine the flooding further north.

anyhow, i must say this storm has been full of surprises. and it should be a loud wakeup call for those who think lightly of tropical systems. if a minimal tropical storm can conjure up this much destruction, imagine what a much stronger storm meandering in the gulf can do. the people around tampa should especially take heed. this storm showed the vulnerability of the highway system. closed bridges and expressways limits access and more importantly, evacuation routes.
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Can a new CoC form to the northeast of the current one? In that big blob of activity off the GA coast?
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Quoting LargoFl:
......................................hey guys..did you see THIS?...its for today..is there some NEW storm trying to form way down by mexico

Hey Largo...I'm not seeing much on satellite, but I'm not sure if the models are predicting development in that area.
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Quoting Neapolitan:
McCook, NE:
hot

Hill City, KS:
hot

Corpus Christi, TX:
hot

Denver, CO:
hot


It's a good thing we're late into summer with those temps. Relief is on the way! <<<<< sarcasm

If only someone had predicted more frequent, intense and long-lasting heat waves.
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WOUS64 KWNS 262018
WOU2

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 432
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT TUE JUN 26 2012

SEVERE THUNDERSTORM WATCH 432 IS IN EFFECT UNTIL 1000 PM CDT
FOR THE FOLLOWING LOCATIONS

TXC013-015-021-025-029-041-051-055-089-091-123-149 -157-163-175-
177-185-187-209-239-255-285-287-297-311-325-453-46 9-473-477-481-
493-270300-
/O.NEW.KWNS.SV.A.0432.120626T2025Z-120627T0300Z/

TX
. TEXAS COUNTIES INCLUDED ARE

ATASCOSA AUSTIN BASTROP
BEE BEXAR BRAZOS
BURLESON CALDWELL COLORADO
COMAL DEWITT FAYETTE
FORT BEND FRIO GOLIAD
GONZALES GRIMES GUADALUPE
HAYS JACKSON KARNES
LAVACA LEE LIVE OAK
MCMULLEN MEDINA TRAVIS
VICTORIA WALLER WASHINGTON
WHARTON WILSON


ATTN...WFO...EWX...HGX...CRP...
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Member Since: August 6, 2011 Posts: 4 Comments: 42272
Wind Advisory in effect until 8 PM EDT this evening...

The National Weather Service in Miami has issued a Wind
Advisory... which is in effect until 8 PM EDT this evening.

* Timing... gusty southwest winds will continue through early this
evening.

* Winds... southwest winds of 25 to 30 mph with frequent gusts of
40 to 45 mph.
Member Since: May 23, 2012 Posts: 0 Comments: 4984
726. cha0s
Getting dumped on again here on the westside of Jax. I've never seen this much rain in two days.
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Quoting BaltimoreBrian:


That would be very ugly for the JAX metro area if that happens. JAX has had a foot of rain already I believe.


We had seagulls bathing and floating around in our parking lot in Jax Beach yesterday and today, if that is any indication as to the amount of rain we have had.
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NW side of Houston

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......................................hey guys..did you see THIS?...its for today..is there some NEW storm trying to form way down by mexico
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting RitaEvac:

Yup, there go a few of them. I imagine that they'll generally be quick pulse type storms, but they could produce some strong winds due to the huge dewpoint depressions that often result when the temperatures get this hot.



And that skew T is of this morning's data, so just draw out the temp line along the dry adiabat to the 40*C line at the surface. That's how hot it is at the moment.
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Patches of blue sky starting to emerge in the skies over Tallahassee; haven't seen that since Saturday.
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Member Since: August 6, 2011 Posts: 4 Comments: 42272
Debby has managed to double her speed since yesterday....up to 6 mph now....from 3 mph. XD
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Any rotation in Central Atlantic?
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Wunderground Iphone app location

102 degree air temp
75 degree dewpoint
117 degree heat index
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McCook, NE:
hot

Hill City, KS:
hot

Corpus Christi, TX:
hot

Denver, CO:
hot
Member Since: November 8, 2009 Posts: 4 Comments: 13805
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting jeffs713:

Nuh-uh...

And I wonder if we hit the convective temp today...

Well, we are at 104 at the moment with probably two more hours of heating left today. I'd say it is at least plausible. :P

As for the impulse itself, it's way up there, at the 200-300 mb level. In fact, it looks like it might be from the same ULL that has been shearing Debby!



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.............Howard franklin Bridge monday
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting BaltimoreBrian:


That's good. Were you in a drought before this storm?


Very much so but Debby has wiped out.
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Quoting oakland:
My area only had about 8 inches of rain spread out over roughly 2 days and we were able to dissipate it off the roadways fairly quickly.


That's good. Were you in a drought before this storm?
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Member Since: August 6, 2011 Posts: 4 Comments: 42272
My area only had about 8 inches of rain spread out over roughly 2 days and we were able to dissipate it off the roadways fairly quickly.
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Quoting GeoffreyWPB:
For West Palm Beach...



Good news for those in Florida! It appears both subsidence from Debby and a building ridge in her wake will completely dry out Florida Friday through next week. The only bad news is. It could possibly get real hot! Right now forecasters are being conservative with low-mid 90's, but I would not doubt them tweaking their temps on up towards the century mark!
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Quoting oakland:


Where I am no except for the outer islands like Anna Maria.
ok ty
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Quoting jeffs713:

Nuh-uh...

And I wonder if we hit the convective temp today...
hope you folks get your rains, but watch out for that bad weather
Member Since: August 6, 2011 Posts: 4 Comments: 42272
Please tell me none of the long range models show anything near Florida July 6 - 11

Already had 1 family vacation messed up! Plus Florida doesn't need any more rain and storm
Member Since: June 21, 2012 Posts: 0 Comments: 68
Quoting LargoFl:
much flooding down there?


Where I am no except for the outer islands like Anna Maria.
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Chat, Gro?
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Quoting 1900hurricane:


MESOSCALE DISCUSSION 1289
NWS STORM PREDICTION CENTER NORMAN OK
0202 PM CDT TUE JUN 26 2012

AREAS AFFECTED...S-CNTRL/SERN TX

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 261902Z - 262100Z

PROBABILITY OF WATCH ISSUANCE...60 PERCENT

SUMMARY...AT LEAST ISOLATED HIGH-BASED TSTMS SHOULD FORM WITHIN A
HOT THERMODYNAMIC ENVIRONMENT BY LATE AFTERNOON. WITH MODERATE
MID-LEVEL NELYS...UPDRAFTS COULD COALESCE INTO AN ORGANIZED CLUSTER
WITH THREATS OF ISOLATED SEVERE WIND AND HAIL.

DISCUSSION...CU HAS INCREASED IN THE PAST HOUR IN VISIBLE SATELLITE
IMAGERY ALONG THE COASTAL PLAIN AND HILL COUNTRY. PRESENCE OF
SCATTERED CIRRUS SUGGESTS A SUBTLE UPPER-LEVEL IMPULSE ALONG THE WRN
GULF COAST MAY BE ENHANCING ASCENT. WITH SURFACE TEMPERATURES NOW
REACHING 100-105...MLCIN SHOULD BE WEAK WITH A DEEPLY-MIXED BOUNDARY
LAYER PER ACARS DATA INVOF AUS. GUIDANCE IS FAIRLY CONSISTENT THAT
TSTMS SHOULD FORM...ALTHOUGH THE LACK OF WELL-DEFINED
SURFACE/UPPER-LEVEL FEATURES BREEDS UNCERTAINTY IN WHERE DEVELOPMENT
WILL FOCUS. NEVERTHELESS...PRESENCE OF 30-35 KT MID-LEVEL NELYS
SAMPLED IN THE LEDBETTER TX PROFILER WOULD BE SUFFICIENT FOR
ORGANIZING UPDRAFTS. THE STEEP LAPSE RATE ENVIRONMENT SHOULD PROMOTE
RISKS FOR SEVERE WIND AND SOME HAIL.

..GRAMS/WEISS.. 06/26/2012


ATTN...WFO...HGX...FWD...CRP...EWX...

LAT...LON 29779993 30519839 31169694 31319508 30339483 29149531
27999721 27599886 27869963 28460022 29090042 29779993

Nuh-uh...

And I wonder if we hit the convective temp today...
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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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