Alert archive / Nebraska / Flash Flood Warnings in 2007

Flash Flood Warning 5, NWS Omaha, NE

May 5, 2007Burt County, Nebraska; Monona County, Iowa

NWS Omaha, NE issued this flash flood warning at May 5, 2007, 8:03 PM CDT for Burt County, Nebraska; Monona County, Iowa. It was in force for 117 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 5, 2007, 8:03 PM CDT (01:03 UTC)
Expired: May 5, 2007, 10:00 PM CDT
In force: 117 min
Issued by: NWS Omaha, NE
Area: Whole counties

Counties Monona County, IA, Burt County, NE

The radar

The Omaha radar (KOAX), 73 km from the middle of the area, began a volume at 01:06 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
May 5, 8:20 PM CDT	FLASH FLOOD	2 N Tekamah, NE	WATER RUNNING ACROSS HWY75
May 5, 8:30 PM CDT	FLASH FLOOD	2 N Tekamah, NE	WATER RUNNING ACROSS HWY75
May 5, 9:15 PM CDT	FLASH FLOOD	Onawa, IA	WIDESPREAD STEET FLOODING

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.1 hours before the alert went out and 73 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2431 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1133 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 7.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KOAX 060104
FFWOAX
IAC133-NEC021-060300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
803 PM CDT SAT MAY 5 2007

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BURT COUNTY IN EAST CENTRAL NEBRASKA...
  MONONA COUNTY IN WEST CENTRAL IOWA...

* UNTIL 1000 PM CDT

* AT 758 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING FROM A THUNDERSTORM 
  OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO            
  TEKAMAH...WHITING...ONAWA AND DECATUR

THIS INCLUDES INTERSTATE 29 IN IOWA BETWEEN MILE MARKERS 101 AND 125.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY AND
MOVE TO HIGHER GROUND.

LAT...LON 4169 9644 4168 9612 4186 9614 4187 9593
      4220 9587 4221 9631 4205 9628 4201 9641

$$

POLLACK

1 follow-up statement

000 
WGUS73 KOAX 060230
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
926 PM CDT SAT MAY 5 2007

IAC133-NEC021-060300-
MONONA IA-BURT NE-
926 PM CDT SAT MAY 5 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR BURT
AND MONONA COUNTIES...

AT 925 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THE WATER 
OVER HIGHWAY 275 HAD RECEEDED JUST NORTH OF TEKAMAH.  THUNDERSTORMS 
CONTINUE FROM SOUTHWEST BURT COUNTY THROUGH WESTERN AND NORTHERN 
MONONA COUNTY.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
WHITING...ONAWA AND DECATUR.

WIDESPREAD STREET FLOODING WAS REPORTED IN ONAWA AS OF 915 PM BY 
LOCAL LAW ENFORCEMENT OFFICIALS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4169 9644 4168 9612 4186 9614 4187 9593
      4220 9587 4221 9631 4205 9628 4201 9641

$$

JR

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this flash flood warning went out at May 5, 4:07 PM CDT, 3 hours 56 minutes earlier.

Area forecast discussion, May 5, 4:07 PM CDT, 3 hours 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
407 PM CDT SAT MAY 5 2007

.DISCUSSION...
SHORT TERM CONCERNS WILL BE ONGOING SEVERE WEATHER WITH PDS
TORNADO WATCHES POSTED IN OUR CWA AND IN THE MIDST OF SVR/TOR
WARNINGS.

LATEST SFC ANALYIS HAD LOW PRES CENTERED NR LBF EXTENDING WWD INTO
ERN CO. THE WRMFNT EXTENDS ACR CNTRL NEB INTO NE NEB AND SW IA
WITH THE DRYLINE OVR WRN KS. THE MOST ACTIVE PORTION OF THE
FORECAST AREA HAS GENERALLY BEEN N FROM OLU TO LNK TO HARLAN.
INSTABILITY WILL CONTINUE TO BE FAVORABLE ACROS THE FCST OF THE
FCST AREA...HOWEVER...PER THE 18Z OAX SOUNDING...A CAP HAS THUS
FAR HELD CONVECTION ACRS THE SE PORTION OF THE FCST AREA BACK.

EXPECT THE THREAT FOR SEVERE STORMS WITH LARGE HAIL...ISOLATED
TORNADOES...AND DAMAGING WINDS POSSIBLE THIS EVENING. THE SHEAR
REMAINS HIGH THIS EVENING...THEN DECREASES AFTER
MIDNIGHT...THEREFORE EXPECT THE SEVERE THREAT TO BECOME MORE
ISOLATED LATER TONIGHT. HOWEVER STORMS WITH HEAVY RAIN AND
ISOLATED TO CONTINUE. THE LOW LEVEL JET IS FORECAST TO STRENGTHEN
OVERNIGHT...AND THIS SHOULD ALSO AID IN TSRA DEVLOPMENT AND HEAVY
RAIN. THE MID TROPOSPHERIC TROF REMAINS TO THE WEST THROUGH
TUESDAY. THE SFC FRONT REMAINS OVR WRN NEB SUN. THIS FRONT DOES
NOT PROGRESS INTO ERN NEB UNTIL MON.

IN ADDITION TO THE SEVERE WEATHER...EXPECT WINDY CONDITIONS INTO
EARLY THIS EVENING. WITH HIGHER PRECEDENT HEADLINES IN PLACE...DO
NOT HAVE WIND ADVISORY GOING. DUE TO LOCALIZED RAINFALL OF 1 TO 3
INCHES TODAY AND ADDITIONAL 1 TO 3 INCHES POSSIBLE TONIGHT. OPTED
TO GO WITH A FLASH FLOOD WATCH THROUGH NOON SUNDAY. 3/6HR GUID IS
MOSTLY BETWEEN 1.5 TO 2.5 INCHES AND SEVERAL PLACES HAVE REPORTED
LOWLAND FLOODING AND STREAM RUNNING NEAR BANKFULL. FF THREAT WILL
CONTINUE INTO MONDAY...BUT WILL HOLD OFF ON EXTENDING WATCH FOR NOW.

NOTE...EXCESSIVE DAY1 RAINFALL RISK IN THE MOD CATEGORY BY HPC FOR
MOST OF THE CWA.

DID NOT MAKE SIG CHANGES TO EXTENDED DUE TO SEVERE WEATHER SITUATION.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...FLASH FLOOD WATCH THROUGH SUNDAY MORNING FOR NEZ011-012-015>018-
     030>034-042>045-050>053-065>068-078-088>093.

IA...FLASH FLOOD WATCH THROUGH SUNDAY MORNING FOR IAZ043-055-056-069-
     079-080-090-091.

&&

ZAPOTOCNY

Hazardous weather outlook, May 5, 3:30 PM CDT, 4 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
330 PM CDT SAT MAY 5 2007

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-052330-
ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-
FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON-
MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE-
PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD-
SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE-
330 PM CDT SAT MAY 5 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF EASTERN NEBRASKA AND
SOUTHWEST IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A TORNADO WATCH IS IN EFFECT FOR EASTERN NEBRASKA AND PARTS OF
SOUTHWEST IOWA INTO THIS EVENING. THUNDERSTORMS ALONG AND WEST OF
HIGHWAY 81 AT MID AFTERNOON SHOULD DEVELOP EASTWARD INTO THIS
EVENING. STORMS COULD PRODUCE STRONG WINDS AND HAIL. IN ADDITION...
BECAUSE OF VERY STRONG VERTICAL WIND SHEAR...SOME TORNADOES ARE
ALSO POSSIBLE.

THE ATMOSPHERE IS VERY MOIST AND UNSTABLE. THE THREAT FOR HAIL
PRODUCING STORMS SHOULD CONTINUE PAST MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE ACTIVE WEATHER PATTERN WILL CONTINUE THROUGH AT LEAST MONDAY
MORNING. SEVERE THUNDERSTORMS WITH LARGE HAIL OR TORNADOES WILL
AGAIN BE POSSIBLE ON SUNDAY OR SUNDAY EVENING...WITH HEAVY RAIN
PRODUCING LOCALIZED FLOODING POSSIBLE.

THERE IS AT LEAST A SLIGHT CHANCE FOR MORE THUNDERSTORMS AT JUST
ABOUT ANY TIME THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS WILL LIKELY BE NEEDED THIS AFTERNOON AND EVENING...MAINLY
ACROSS EASTERN NEBRASKA.

MILLER

In the hours before

Local storm report, May 5, 5:29 PM CDT, 2 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
529 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0524 PM     TORNADO          1 N BLOOMFIELD          42.61N 97.65W
05/05/2007                   KNOX               NE   PUBLIC

&&

KLISH

Local storm report, May 5, 5:32 PM CDT, 2 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
532 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0528 PM     TORNADO          2 S CROFTON             42.70N 97.50W
05/05/2007                   KNOX               NE   EMERGENCY MNGR

&&

KLISH

Local storm report, May 5, 5:38 PM CDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
538 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0527 PM     HAIL             BLOOMFIELD              42.60N 97.65W
05/05/2007  M4.25 INCH       KNOX               NE   CO-OP OBSERVER

            HAIL UP TO SOFTBALL SIZE.

&&

MILLER

Local storm report, May 5, 6:22 PM CDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
622 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 PM     TORNADO          8 N CROFTON             42.85N 97.50W
05/05/2007                   KNOX               NE   TRAINED SPOTTER

            TWO TORNADOES CROSSING LEWIS AND CLARK LAKE WEST OF
            GAVINS POINT DAM. SPOTTER REPORT VIA EMERGENCY
            MANAGEMENT.

0553 PM     TSTM WND DMG     9 NW CROFTON            42.82N 97.62W
05/05/2007                   KNOX               NE   EMERGENCY MNGR

            WIND DAMAGE AT WEIGAND MARINA. SEVERAL MOTOR HOMES
            OVERTURNED. POSSIBLE TORNADO. UNKNOWN INJURIES. POSSIBLE
            TORNADO. INFO VIA CEDAR COUNTY EM.

0605 PM     HEAVY RAIN       DORCHESTER              40.65N 97.11W
05/05/2007  E0.00 INCH       SALINE             NE   TRAINED SPOTTER

            STREET FLOODING IN DORCHESTER.

0605 PM     HEAVY RAIN       CRETE                   40.63N 96.96W
05/05/2007  M0.00 INCH       SALINE             NE   TRAINED SPOTTER

            2.85 INCHES OF RAIN. ALSO 2.75 INCHES AT DORCHESTER.
            STREET FLOODING IN CRETE AND DORCHESTER.

&&

KLISH

Local storm report, May 5, 6:36 PM CDT, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
636 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0617 PM     HEAVY RAIN       2 NW LINCOLN            40.84N 96.72W
05/05/2007  E0.00 INCH       LANCASTER          NE   TRAINED SPOTTER

            HEAVY RAIN. WATER COVERED THE ROAD. ROAD IMPASSIBLE.

&&

MILLER

Local storm report, May 5, 7:20 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
720 PM CDT SAT MAY 05 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 PM     HAIL             MALCOLM                 40.91N 96.87W
05/05/2007  E1.25 INCH       LANCASTER          NE   EMERGENCY MNGR

0545 PM     HAIL             DENTON                  40.74N 96.84W
05/05/2007  E1.25 INCH       LANCASTER          NE   EMERGENCY MNGR

0555 PM     HAIL             RAYMOND                 40.96N 96.78W
05/05/2007  E1.25 INCH       LANCASTER          NE   EMERGENCY MNGR

0645 PM     HAIL             THURMAN                 40.82N 95.75W
05/05/2007  E0.88 INCH       FREMONT            IA   FIRE DEPT/RESCUE

0649 PM     FLASH FLOOD      WAHOO                   41.22N 96.62W
05/05/2007                   SAUNDERS           NE   LAW ENFORCEMENT

            RAILROAD TRACKS AND BALLFIELD FLOODED

0655 PM     FLASH FLOOD      LINCOLN                 40.82N 96.69W
05/05/2007                   LANCASTER          NE   EMERGENCY MNGR

            URBAND FLOODING DUE TO 3 INCHES OF RAIN SINCE 530 PM

0700 PM     HAIL             WESTON                  41.19N 96.74W
05/05/2007  E0.75 INCH       SAUNDERS           NE   LAW ENFORCEMENT

&&

JKLISH

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 5, 7:13 PM CDT	Flash Flood Warning	OAX	Dodge, Washington	2 hr
May 5, 7:13 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	32 min
May 5, 7:27 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Washington	33 min
May 5, 7:34 PM CDT	Severe Thunderstorm Warning	OAX	Burt	56 min
May 5, 9:42 PM CDT	Severe Thunderstorm Warning	OAX	Boone	33 min
May 5, 9:51 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	24 min
May 5, 10:11 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	34 min
May 5, 10:49 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe	41 min
May 5, 10:53 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	37 min
May 5, 11:22 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	23 min
May 5, 11:24 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	36 min
May 5, 11:34 PM CDT	Severe Thunderstorm Warning	OAX	Knox	41 min
May 5, 11:44 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	46 min
May 6, 12:19 AM CDT	Severe Thunderstorm Warning	OAX	Dodge	41 min
May 6, 12:32 AM CDT	Flash Flood Warning	OAX	Gage, Johnson, Otoe, Pawnee	118 min
May 6, 1:01 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	59 min
May 6, 1:06 AM CDT	Flash Flood Warning	OAX	Cass, Sarpy	114 min
May 6, 1:14 AM CDT	Flash Flood Warning	OAX	Jefferson	2 hr
May 6, 4:14 AM CDT	Flash Flood Warning	OAX	Sarpy	2 hr
May 5, 7:06 PM CDT	Tornado Warning	OAX	Mills	24 min
May 5, 7:28 PM CDT	Tornado Warning	OAX	Pottawattamie	32 min
May 5, 7:33 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	27 min
May 5, 7:44 PM CDT	Tornado Warning	OAX	Fremont	31 min
May 5, 8:00 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	30 min
May 5, 8:03 PM CDT	Severe Thunderstorm Warning	OAX	Monona	42 min
May 5, 8:05 PM CDT	Tornado Warning	OAX	Mills, Montgomery	40 min
May 5, 8:38 PM CDT	Tornado Warning	OAX	Pottawattamie	52 min
May 5, 8:45 PM CDT	Severe Thunderstorm Warning	OAX	Monona	30 min
May 5, 8:46 PM CDT	Tornado Warning	OAX	Montgomery	14 min
May 5, 8:47 PM CDT	Severe Thunderstorm Warning	OAX	Page	43 min
May 5, 9:22 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	38 min
May 5, 9:25 PM CDT	Tornado Warning	OAX	Pottawattamie	35 min
May 5, 9:58 PM CDT	Flash Flood Warning	OAX	Monona	2 hr
May 5, 10:05 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	40 min
May 5, 10:21 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	24 min
May 5, 10:54 PM CDT	Severe Thunderstorm Warning	OAX	Mills	36 min
May 5, 11:15 PM CDT	Flash Flood Warning	OAX	Pottawattamie	2 hr
May 5, 11:17 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	28 min
May 5, 11:34 PM CDT	Flash Flood Warning	OAX	Harrison, Monona	116 min
May 5, 11:49 PM CDT	Tornado Warning	OAX	Pottawattamie	41 min
May 6, 12:56 AM CDT	Flash Flood Warning	OAX	Pottawattamie	2 hr
May 6, 12:56 AM CDT	Flash Flood Warning	OAX	Pottawattamie	2 hr
May 6, 1:23 AM CDT	Flash Flood Warning	OAX	Harrison, Monona	37 min
May 6, 1:28 AM CDT	Flash Flood Warning	OAX	Harrison, Monona	2 hr
May 6, 1:51 AM CDT	Severe Thunderstorm Warning	OAX	Page	24 min
May 6, 2:21 AM CDT	Severe Thunderstorm Warning	OAX	Montgomery	24 min
May 6, 2:25 AM CDT	Flash Flood Warning	OAX	Fremont, Mills, Montgomery, Page	2 hr
May 6, 4:25 AM CDT	Flash Flood Warning	OAX	Harrison	2 hr
May 6, 4:45 AM CDT	Flash Flood Warning	OAX	Fremont, Montgomery, Page	3 hr
May 6, 6:15 AM CDT	Flash Flood Warning	OAX	Harrison	3 hr
May 6, 7:28 AM CDT	Flash Flood Warning	OAX	Fremont, Montgomery, Page	3 hr

Nearby

Flash Flood Warnings in Nebraska, 2007 Flash Flood Warnings in Iowa, 2007 Every flash flood warning in 2007

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.