Alert archive / Iowa / Flash Flood Warnings in 1990
Flash Flood Warning 23, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 30, 1990, 1:05 PM CDT for Davis County, Van Buren County, Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jun 30, 1990, 1:05 PM CDT (18:05 UTC)
- Expired
- Jun 30, 1990, 5:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Davis County, IA, Van Buren County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 6.1 hours before the alert went out and 357 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3663 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 301807
FFWDSM
IAC177-051-302200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
105 PM CDT SAT JUN 30 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 500 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE SOUTHEAST PART OF IOWA
SOUTHWEST HALF OF VAN BUREN...ALL OF DAVIS
A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR IS OCCURRING.
TAKE THE NECESSARY PRECAUTIONS IMMEDIATELY.
THUNDERSTORMS HAVE REPEATEDLY MOVED OVER SOUTHEAST DAVIS AND
SOUTHERN VAN BUREN COUNTIES SINCE ABOUT 9 OR 10 AM SATURDAY
MORNING. RADAR ESTIMATES OF RAINFALL NOW INDICATE THAT SOME
ISOLATED AREAS MAY HAVE RECEIVED OVER 4 INCHES OF RAIN.
IT APPEARS THAT THE GREATEST FLOODING THREAT AT THIS TIME WILL
BE FROM NEAR PULASKI...THROUGH THE CANTRILL AND MILTON AREAS...
TO NEAR MOUNT STERLING. THESE AREAS ARE SOME 20 TO 40 MILES
SOUTH AND SOUTHEAST OF OTTUMWA.
RADAR ALSO INDICATES ADDITIONAL THUNDERSTORMS ARE FORMING OVER
DAVIS COUNTY...AND THESE WILL BE MOVING OVER THE AREAS THAT HAVE
ALREADY RECEIVED THE GREATEST RAINS.
PEOPLE IN FLOOD PRONE OR LOW LYING AREAS SHOULD MOVE TO HIGHER
GROUND AT ONCE. ACT QUICKLY...AS FLOOD WATERS OFTEN RISE RAPIDLY.
IF YOU ARE DRIVING...DO NOT TRY TO DRIVE THROUGH FLOOD WATERS OF
UNKNOWN DEPTH. IF YOUR VEHICLE STALLS...ABANDON IT IMMEDIATELY
AND SEEK HIGHER GROUND.
TRUETT/WEINBRECHTWhat 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.
In the hours before
Special weather statement, Jun 30, 10:48 AM CDT, 2 hours 17 minutes before
IAZALL-301630- SPECIAL STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1048 AM CDT SAT JUN 30 1990 AT 1035 AM...INTENSE THUNDERSTORMS WERE LOCATED ALONG THE IOWA/MISSOURI BORDER OVER EXTREME SOUTHEAST IOWA. THE STORMS WERE OCCURRING SOUTH OF A LINE FROM 30 MILES SOUTHEAST OF OTTUMWA...NEAR KEOSAUQUA EAST TO BURLINGTON. THE STRONGEST STORM WAS LOCATED NEAR DONNELLSON OR 20 MILES SOUTHWEST OF BURLINGTON. LARGE HAIL...VERY HEAVY RAIN AND DAMAGING THUNDERSTORMS WINDS COULD OCCUR WITH THESE STORMS. FLOODING IS LIKELY PARTICULARLY IN LOW LYING AREAS AND AROUND SMALL RIVERS AND STREAMS...AS SEVERAL STORMS HAVE MOVED OVER THIS AREA IN THE PAST TWO HOURS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. BARLOW
Special weather statement, Jun 30, 11:48 AM CDT, 1 hour 17 minutes before
IAZALL-301730- SPECIAL STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1148 AM CDT SAT JUN 30 1990 AT 1135 AM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS LOCATED IN SOUTHWEST VAN BUREN COUNTY NEAR THE TOWN OF CANTRIL...OR 35 MILES SOUTH SOUTHEAST OF OTTUMWA. THIS STORMS WILL PRODUCE VERY HEAVY RAIN...FRQUENT DEADLY LIGHTNING AND POSSIBLY SOME SMmALL HAIL. A THUNDERSTORM HAD DEVELOPED OVER CENTRAL IOWA AND WAS LOCATED ABOUT 30 MILES NORTH OF DES MOINES NEAR NEVADA. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. BARLOW
Special weather statement, Jun 30, 11:53 AM CDT, 1 hour 12 minutes before
IAZALL-301730- SPECIAL STATEMENT AND RADAR SUMMARY...CORRECTED TYPO NATIONAL WEATHER SERVICE DES MOINES IA 1148 AM CDT SAT JUN 30 1990 AT 1135 AM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS LOCATED IN SOUTHWEST VAN BUREN COUNTY NEAR THE TOWN OF CANTRIL...OR 35 MILES SOUTH SOUTHEAST OF OTTUMWA. THIS STORM WILL PRODUCE VERY HEAVY RAIN...FREQUENT DEADLY LIGHTNING }AND POSSIBLY SOME SMALL HAIL. A THUNDERSTORM HAD DEVELOPED OVER CENTRAL IOWA AND WAS LOCATED ABOUT 30 MILES NORTH OF DES MOINES NEAR NEVADA. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. BARLOW
Special weather statement, Jun 30, 12:29 PM CDT, 36 minutes before
IAZALL-302000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1230 PM CDT SAT JUN 30 1990 ...DANGEROUS HEAT AND HUMIDITY LEVELS OVER IOWA... A POTENTIALLY DANGEROUS COMBINATION OF HEAT AND HUMIDITY IS BUILDING OVER IOWA THIS AFTERNOON. WHILE THE LAST FEW DAYS HAVE ALSO BEEN HOT AND HUMID...CONDITIONS WILL BE FAR WORSE IN MOST AREAS THIS AFTERNOON. ALREADY AT 12 NOON...TEMPERATURES IN THE STATE WERE HOVERING AROUND THE 90 DEGREE MARK...WITH DEWPOINTS IN THE MIDDLE 70S. THE HEAT INDEX.. WHICH IS A MEASURE OF THE COMBINED EFFECTS OF HEAT AND HUMIDITY... WAS ALREADY AROUND THE 100 DEGREE MARK IN MANY AREAS. AN ADDED STRESS IS BEING CAUSED BY A LACK OF WIND...AS SPEEDS THROUGHOUT THE STATE WERE UNDER 10 MILES AN HOUR. CONDITIONS WILL ONLY WORSEN DURING THE AFTERNOON...AS TEMPERATURES CLIMB SLOWLY. REMEMBER...IN THIS WEATHER YOU SHOULD SLOW DOWN AND TAKE IT EASY. STRENOUS ACTIVITY CAN BE VERY DANGEROUS...ESPECIALLY FOR THOSE WHO ARE NOT IN TOP PHYSICAL CONDITION. IF WORKING OUTDOORS...TAKE FREQUENT BREAKS...DRINK PLENTY OF NON-ALCOHOLIC BEVERAGES...AND TRY TO STAY OUT OF THE DIRECT SUN. IF POSSIBLE...TAKE ADVANTAGE OF AIR CONDITIONING. THE LEAST SEVERE CONDITIONS WILL BE OVER THE NORTHWEST COUNTIES...AS HUMIDITY LEVELS WILL BE SLIGHTLY LESS THAN ELSEWHERE IN THE STATE. HOWEVER...TEMPERATURES IN THE NORTHWEST WILL STILL BE WELL INTO THE 90S. TRUETT
Special weather statement, Jun 30, 12:33 PM CDT, 32 minutes before
IAZALL-301800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1230 AM CDT SAT JUN 30 1990 TO USERS OF IAWAS... STATE RADIO CALLED AND STATED THAT THE PROBLEM WITH IAWAS IS BEING WORKED ON BUT THEY DO NOT KNOW HOW LONG THEY IT WILL BE. PLEASE PAY ATTENTION TO YOUR WIRES IN THE EVENT THAT SEVERE THUNDERSTORM OR TORNADO WATCHES ARE ISSUED FROM THE NATIOMAL WEATHER SERVICE AT OMAHA...DES MOINES...WATERLOO...MOLINE...DUBUQUE OR SIOUX CITY. WEINBRECHT
Special weather statement, Jun 30, 12:50 PM CDT, 15 minutes before
IAZALL-301830- SPECIAL STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1249 PM CDT SAT JUN 30 1990 AT 1235 PM...INTENSE THUNDERSTORMS PERSISTED ALONG THE IOWA/MISSOURI BORDER OVER EXTREME SOUTHEAST IOWA. THE STRONGEST STORM IN IOWA WAS LOCATED IN DAVIS COUNTY ABOUT 5 MILES EAST OF BLOOMFIELD OR ABOUT 20 MILES SOUTHEAST OF OTTUMWA. THIS STORM WILL PRODUCE VERY HEAVY RAIN...FREQUENT DEADLY LIGHTNING AND POSSIBLY SOME HAIL. ISOLATED THUNDERSTORMS HAD DEVELOPED IN SOUTHWEST IOWA SOME 70 TO 85 MILES SOUTHWEST OF DES MOINES...JUST WEST OF VILLISCA AND 5 MILES SOUTHEAST OF SHENANDOAH. THE THUNDERSTORM OVER CENTRAL IOWA NORTH OF DES MOINES HAD DISSIPATED. THE SHOWERS AND STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:44 PM CDT | Tornado Warning | DMX | Wright | 40 min |
| Jun 30, 8:24 AM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 36 min |
| Jun 30, 9:39 AM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 36 min |
| Jun 30, 10:20 AM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 25 min |
| Jun 30, 1:30 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Van Buren | 45 min |
| Jun 30, 2:53 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 37 min |
| Jun 30, 3:08 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 37 min |
| Jun 30, 3:23 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 37 min |
| Jun 30, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 30 min |
| Jun 30, 3:42 PM CDT | Tornado Warning | DMX | Madison, Warren | 33 min |
| Jun 30, 4:01 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Union | 44 min |
| Jun 30, 4:19 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 41 min |
| Jun 30, 4:36 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 54 min |
| Jun 30, 4:39 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 51 min |
| Jun 30, 4:42 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Union | 48 min |
| Jun 30, 4:57 PM CDT | Tornado Warning | DMX | Decatur | 33 min |
| Jun 30, 5:00 PM CDT | Flash Flood Warning | DMX | Mahaska | 4 hr |
| Jun 30, 5:03 PM CDT | Tornado Warning | DMX | Adams, Union | 27 min |
Nearby
Flash Flood Warnings in Iowa, 1990Every flash flood warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.