Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 288, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 8, 2011, 5:49 PM EDT for Anderson County, Greenville County, Pickens County, South Carolina. It was in force for 56 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 8, 2011, 5:49 PM EDT (21:49 UTC)
- Expired
- Jun 8, 2011, 6:45 PM EDT
- In force
- 56 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
Counties Anderson County, SC, Greenville County, SC, Pickens County, SC
The radar
The Greer radar (KGSP), 28 km from the middle of the area, began a volume at 21:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 6:00 PM EDT | TSTM WND DMG | Easley, SC | FIRE DEPARTMENT REPORTS SEVERAL LARGE LIMBS DOWN AND AT LEAST ONE POWER LINE. |
| Jun 8, 6:05 PM EDT | HAIL 1 | Easley, SC | QUARTER SIZED HAIL REPORTED BY THE PUBLIC. |
| Jun 8, 6:12 PM EDT | HAIL 0.75 | 1 W Easley, SC | HAIL WAS INCREASING IN SIZE AS THE CELL PHONE CALL OCCURRED...UP TO DIME SIZED. WIND WAS QUITE STRONG. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 11 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 243 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1150 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 1028 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
307 WUUS52 KGSP 082149 SVRGSP SCC007-045-077-082245- /O.NEW.KGSP.SV.W.0288.110608T2149Z-110608T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 549 PM EDT WED JUN 8 2011 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL ANDERSON COUNTY IN UPSTATE SOUTH CAROLINA... CENTRAL GREENVILLE COUNTY IN UPSTATE SOUTH CAROLINA... EASTERN PICKENS COUNTY IN UPSTATE SOUTH CAROLINA... * UNTIL 645 PM EDT * AT 537 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 3 MILES SOUTHWEST OF DACUSVILLE...OR 7 MILES EAST OF PICKENS...MOVING SOUTH AROUND 5 MPH. ANOTHER THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WIND AND LARGE HAIL WAS JUST EAST OF EASLEY. THAT STORM WAS ALSO MOVING SOUTH AROUND 5 MPH. * LOCATIONS IMPACTED INCLUDE... EASLEY... POWDERSVILLE AND WELCOME... PIEDMONT... PRECAUTIONARY/PREPAREDNESS ACTIONS... PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. SEEK SHELTER INDOORS AWAY FROM WINDOWS AND DOORS UNTIL THE STORM PASSES. TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING...THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2. && LAT...LON 3470 8233 3469 8266 3491 8273 3504 8251 TIME...MOT...LOC 2145Z 317DEG 11KT 3488 8256 $$ LGL
2 follow-up statements
685 WWUS52 KGSP 082205 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 605 PM EDT WED JUN 8 2011 SCC007-045-077-082245- /O.CON.KGSP.SV.W.0288.000000T0000Z-110608T2245Z/ ANDERSON SC-GREENVILLE SC-PICKENS SC- 605 PM EDT WED JUN 8 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR EAST CENTRAL PICKENS...CENTRAL GREENVILLE AND NORTH CENTRAL ANDERSON COUNTIES... AT 602 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE TWO THUNDERSTORMS THAT WERE OVER SOUTHEASTERN PICKENS COUNTY HAVE MERGED INTO ONE LARGE THUNDERSTORM. RADAR INDICATED THAT THIS STORM WAS PRODUCING LARGE HAIL JUST TO THE NORTH OF EASELY. ANOTHER STRENGTHENING THUNDERSTORM WAS JUST TO THE WEST OF PIEDMONT. THE THUNDERSTORMS ARE REMAINING NEARLY STATIONARY... BUT A SLIGHT DRIFT TO THE SOUTH OR SOUTHWEST IS EXPECTED. LAT...LON 3470 8233 3469 8266 3491 8273 3504 8251 TIME...MOT...LOC 2202Z 317DEG 11KT 3484 8252 $$ LGL
197 WWUS52 KGSP 082240 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 640 PM EDT WED JUN 8 2011 SCC007-045-077-082250- /O.EXP.KGSP.SV.W.0288.000000T0000Z-110608T2245Z/ ANDERSON SC-GREENVILLE SC-PICKENS SC- 640 PM EDT WED JUN 8 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PICKENS...CENTRAL GREENVILLE AND NORTH CENTRAL ANDERSON COUNTIES WILL EXPIRE AT 645 PM EDT... LAT...LON 3470 8233 3469 8266 3491 8273 3504 8251 TIME...MOT...LOC 2240Z 317DEG 11KT 3476 8242 $$ LGL
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 8, 5:40 PM EDT, 9 minutes earlier.
Area forecast discussion, Jun 8, 5:40 PM EDT, 9 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 540 PM EDT WED JUN 8 2011 .SYNOPSIS... AN UPPER LEVEL RIDGING WILL CONTINUE THROUGH THE END OF THE WEEK... WITH A GRADUALLY SHIFT EASTWARD OVER THE ATLANTIC. A WEAK COLD FRONT WILL APPROACH OVER THE WEEKEND AND MOVE EAST OF THE AREA ON SUNDAY. && .NEAR TERM /THROUGH THURSDAY/... 2130 UTC UPDATE...POPS HAVE BEEN ADJUSTED TO ACCOUNT FOR CONVECTION IN THE UPSTATE SC AND NORTHEAST GA...AND QPF WAS UPDATED FOR THE SAME REASON. AT 230 PM... WIDELY SCATTERED CONVECTION WILL CONTINUE INTO LATE AFTERNOON. WITH LITTLE OR NO WIND THROUGH THE COLUMN...LOCALLY HEAVY RAIN IS A MAIN THREAT...BUT SOME MARGINAL SEVERE HAIL POSSIBLE AS WELL WITH THE TALLEST STORMS. EXPECT CONVECTION WILL WANE QUICKLY ABOUT SUNSET WITH LOSS OF HEATING. DEBRIS CLOUDS EXPECTED TO DISSIPATE DURING THE EVENING ALLOWING FOR CLEAR CONDITIONS OVERNIGHT. MINIMUM TEMPS WILL REMAIN WELL ABOVE AVERAGE PER A MOS BLEND. ON THU WITH THE UPPER RIDGE SHIFTING EAST OF THE AREA ON THU...WEAK UPPER DIVERGENCE WILL RESULT OVER THE AREA. ALSO...MODELS SUGGEST THAT THE LEE TROF WILL BECOME MORE PROMINENT. IN ADDITION...FORECAST SOUNDINGS SUGGEST THAT CIN WILL BE MUCH LESS. ALL THIS SHOULD ALLOW FOR SUBSTANTIALLY MORE THUNDERSTORM COVERAGE IN THE AFTERNOON... EXTENDING OUT OVER THE FOOTHILLS AND INTO THE PIEDMONT AREAS. WILL FEATURE HIGHEST POPS OVER THE MOUNTAINS WHERE 50-60% COVERAGE LOOKS REASONABLE...WITH 20-40% COVERAGE OUTSIDE THE MOUNTAINS. HOT TEMPS WILL CONTINUE ON THU. && .SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/... AS OF 230 PM WEDNESDAY...FRIDAY AND SATURDAY...BROAD RIDGING WILL REMAIN ACROSS THE CWA THROUGH THE PERIOD. FORECAST SOUNDINGS INDICATE A FAIR MOIST PROFILE...WITH PW VALUES AROUND 1.25 INCHES. CIN VALUES APPEAR VERY WEAK WITH CAPE VALUES BETWEEN 500 TO 1000 J/KG. AT THE SFC...WEAK RIDGING IS EXPECTED EAST OF THE MTNS...WITH VERY WEAK LLVL WINDS. IT APPEARS THAT THE ENVIRONMENT WILL FAVOR THE HIGH TERRAIN AND FOOTHILL AREAS FOR CONVECTION INITIATION DURING THE EARLY TO MID AFTERNOON. I WILL INDICATE POPS BETWEEN 20 TO 30 PERCENT ACROSS THE NC ZONES...SCHC ACROSS THE SC UPSTATE AND NE GA. TEMPERATURES WILL REMAIN 5 TO 10 DEGREES ABOVE NORMAL. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... AS OF 120 PM WEDNESDAY...ON SUNDAY...MEDIUM RANGE MODELS INDICATE THAT A WEAK COLD FRONT MAY SLIDE ACROSS THE CWA DURING THE AFTERNOON AND EVENING. THE FRONT WILL LIKELY INCREASE THE POTENTIAL FOR AFTERNOON AND EVENING SHRA/TSRA. FORECAST SOUNDINGS INDICATE MARGINAL LLVL LAPSE RATES WITH CAPE VALUES BELOW 1000 J/KG. IN ADDITION...LLVL WIND FIELDS APPEAR VERY WEAK...GENERALLY LESS THAN 10 KTS BELOW 15 KFT. I WILL FAVOR CHC POPS ACROSS THE MTNS AN THE NC FOOTHILLS AND PIEDMONT...WITH SCHC ACROSS THE UPSTATE AND NE GA. TEMPERATURES WILL REMAIN 5 TO 8 DEGREES ABOVE NORMAL. MONDAY THROUGH WEDNESDAY...VERY LITTLE PATTERN CHANGE IS EXPECTED THROUGH THE PERIOD. THE CWA REMAINS BETWEEN A BROAD MID LEVEL TROF OVER THE ATLANTIC AND MID LEVEL RIDGING ACROSS THE CENTRAL CONUS. WEAK WIND FIELDS AND WEAK TO MARGINAL INSTABILITY WILL SUPPORT AFTERNOON TO EVENING AIR MASS SHRA/TSRA. I WILL LIMIT COVERAGE IN THE 20 TO 30 PERCENT RANGE. TEMPERATURES WILL CONTINUE TO REMAIN 5 TO 8 DEGREES ABOVE NORMAL. && .AVIATION /22Z WEDNESDAY THROUGH MONDAY/... AT KCLT AND ELSEWHERE...VFR EXCEPT FOR SOME EARLY MRNG MVFR FOG AT KAVL AGAIN EARLY ON THU. EXPECT SCT CU ACROSS THE AREA THIS AFTERNOON WITH ISOLD TSTMS IN THE MTNS INTO EARLY EVE...THEN GENLY SKC OVERNIGHT. WINDS WILL BE LIGHT MOSTLY SW. THUNDERSTORMS COULD GET GOING A LITTLE EARLIER ON THU AND BECOME MORE WIDESPREAD OVER THE MOUNTAINS BY 18Z THU...BUT WILL NOT CARRY A CB AT THIS TIME AT KAVL. OUTLOOK...BASED ON LESS CONVECTIVE INHIBITION SHOWN IN THE FORECAST SOUNDINGS ON THU....THUNDERSTORM COVERAGE IS EXPECTED TO BE MORE WIDESPREAD THU AFTERNOON...AND EXTEND OUT OVER THE FOOTHILLS AND NORTHERN PIEDMONT AREAS. UPPER RIDGE GRADUALLY WEAKENS THROUGH LATE WEAK ALLOWING FOR A CONTINUATION OF AT LEAST SCATTERED AFTERNOON AND EVENING THUNDERSTORMS EACH DAY. A COLD FRONT IS EXPECTED TO MOVE IN SUN WITH PERHAPS MORE ORGANIZED THUNDERSTORM THREAT WITH ITS PASSAGE. EARLY MORNING MOUNTAIN VALLEY FOG IS A GOOD BET EACH DAY. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...TJB NEAR TERM...JAT/LG SHORT TERM...NED LONG TERM...NED AVIATION...LG
Hazardous weather outlook, Jun 8, 2:29 PM EDT, 3 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 229 PM EDT WED JUN 8 2011 GAZ010-017-NCZ033-048>053-058-059-062>065-501-503-505-507-509- SCZ001>003-091830- RABUN-HABERSHAM-AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE- GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- 229 PM EDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED THUNDERSTORMS WILL CONTINUE OVER THE MOUNTAINS THIS AFTERNOON INTO EARLY EVENING. A FEW OF THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING STRAIGHT LINE WINDS AND LARGE HAIL. ALSO...THE STORMS WILL BE SLOW MOVING SO LOCALLY HEAVY RAIN WILL ALSO OCCUR AND POSSIBLY LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. SCATTERED TO NUMEROUS THUNDERSTORMS WILL OCCUR THURSDAY AFTERNOON. A FEW OF THESE STORMS COULD BECOME SEVERE AND PRODUCE LARGE HAIL AND DAMAGING WINDS. ALSO...THE STORMS WILL BE SLOW MOVING SO LOCALLY HEAVY RAIN WILL RESULT AND POSSIBLY LOCALIZED FLOODING. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. GAZ018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-508- 510-SCZ004>014-019-091830- STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-DAVIE-CATAWBA-ROWAN- CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- GREATER CALDWELL-GREATER BURKE-EASTERN MCDOWELL-GREATER RUTHERFORD- EASTERN POLK-GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE- SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC- CHESTER-GREENWOOD- 229 PM EDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. SCATTERED THUNDERSTORMS WILL OCCUR THURSDAY AFTERNOON. A FEW OF THESE STORMS COULD BECOME SEVERE AND PRODUCE LARGE HAIL AND DAMAGING WINDS. ALSO...THE STORMS WILL BE SLOW MOVING SO LOCALLY HEAVY RAIN WILL RESULT AND POSSIBLY LOCALIZED FLOODING. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. LG
In the hours before
Local storm report, Jun 8, 5:11 PM EDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
511 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0459 PM HAIL MORGANTON 35.74N 81.70W
06/08/2011 E0.75 INCH BURKE NC PUBLIC
&&
NEDLocal storm report, Jun 8, 5:16 PM EDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
516 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0455 PM HAIL 5 SW MORGANTON 35.69N 81.76W
06/08/2011 M0.88 INCH BURKE NC TRAINED SPOTTER
&&
07Local storm report, Jun 8, 5:17 PM EDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
517 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0515 PM HAIL 3 W ASHEVILLE 35.57N 82.60W
06/08/2011 E1.00 INCH BUNCOMBE NC TRAINED SPOTTER
&&
NEDLocal storm report, Jun 8, 5:18 PM EDT, 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
518 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM HAIL MORGANTON 35.74N 81.70W
06/08/2011 E0.50 INCH BURKE NC PUBLIC
&&
07Local storm report, Jun 8, 5:21 PM EDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
521 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0504 PM HAIL CANDLER 35.54N 82.69W
06/08/2011 E1.00 INCH BUNCOMBE NC PUBLIC
&&
NEDLocal storm report, Jun 8, 5:40 PM EDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
540 PM EDT WED JUN 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0216 PM HAIL 1 N CULLOWHEE 35.33N 83.18W
06/08/2011 E0.75 INCH JACKSON NC CO-OP OBSERVER
HAIL UP TO DIME SIZED FELL FOR A SHORT WHILE. HAD WIND
GUSTS...BUT ONLY IN THE 20 TO 30 MPH RANGE.
0204 PM HAIL 3 NE INGALLS 36.00N 81.97W
06/08/2011 E0.88 INCH AVERY NC TRAINED SPOTTER
THE WIFE OF A SPOTTER FROM CROSSNORE WAS IN THE STORM AT
THREE MILE AND SAW DIME TO NICKEL SIZED HAIL. WIND GUST
DID NOT CAUSE VISIBLE DAMAGE.
&&
OUTLAWThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 3:32 PM EDT | Severe Thunderstorm Warning | GSP | Oconee | 58 min |
| Jun 8, 6:23 PM EDT | Severe Thunderstorm Warning | GSP | Anderson, Greenville | 67 min |
| Jun 8, 7:09 PM EDT | Severe Thunderstorm Warning | GSP | Anderson | 37 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.