Alert archive / Iowa / Flash Flood Warnings in 1990
Flash Flood Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 16, 1990, 9:48 AM CDT for Johnson County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 16, 1990, 9:48 AM CDT (14:48 UTC)
- Expired
- Jun 16, 1990, 12:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Johnson 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, 2.8 hours before the alert went out and 400 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
- 3656 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 237 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 161450
FFWDSM
IAC103-161745-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
948 AM CDT SAT JUN 16 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1245 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN EAST CENTRAL IOWA
...JOHNSON
HEAY RAINS HAVE BEEN FALLING IN JOHNSON COUNTY OR BETWEEN 15 AND 30
MILES TO THE SOUTH OF CEDAR RAPIDS.
THESE HEAVY RAINS HAVE CAUSED WATER TO GO OVER MANY COUNTY ROADS.
AT 930 AM A CAR WAS WASHED FROM A COUNTY ROAD NEAR SOLON.
IN ADDITION...RADAR INDICATES MORE HEAVY RAINS WILL MOVE INTO JOHNSON
COUNTY BETWEEN 10 AM AND 11 AM AND WILL ADD TO THE FLOOD THREAT.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
WHEINBRECHT/MAYWhat 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 16, 3:59 AM CDT, 5 hours 49 minutes before
IAZALL-160930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 350 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TONIGHT... AT 335 AM...NUMEROUS SHOWERS AND SCATTERED STRONG THUNDERSTORMS WERE CONTINUED OVER THE NORTHERN THREE QUARTERS OF IOWA. MOST OF THE SHOWERS AND STORMS WERE LOCATED NORTH OF A LINE FROM 30 MILES SOUTHEAST OF THE OMAHA/COUNCIL BLUFFS AREA EAST TO 15 MILES NORTH OF BURLINGTON. THE STRONGEST STORMS WERE LOCATED 25 MILES SOUTH OF WATERLOO...NEAR VINTON...35 MILES SOUTHWEST OF DES MOINES...OR 5 MILES SOUTHEAST OF GREENFIELD AND 60 MILES SOUTHWEST OF DES MOINES AT CUMBERLAND. THESE STORMS WILL PRODUCE VERY HEAVY RAIN AND NEARLY CONTINUOUS DEADLY LIGHTNING. ADDITIONAL SHOWERS AND STORMS WERE MOVING BACK INTO THE WEST CENTRAL COUNTIES OF IOWA...BETWEEN SIOUX CITY AND OMAHA/COUNCIL BLUFFS. VERY HEAVY RAINS HAVE ALREADY FALLEN IN THIS AREA SO ANY ADDITIONAL RAINS WILL RESULT IN RAPID RUNOFF INTO AREA RIVERS. OVERNIGHT IT APPEARS THAT THE HEAVIEST RAINS HAVE FALLEN OVER HARRISON... MONONA AND WOODBURY COUNTIES. PEOPLE LIVING IN THIS AREA SHOULD MONITOR THE LATEST RIVER LEVELS AND BE PREPARED TO TAKE APPROPRIATE ACTION IF FLOODING IS OBSERVED. BARLOW
Special weather statement, Jun 16, 4:04 AM CDT, 5 hours 44 minutes before
IAZALL-160930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED TO ADD MOVEMENT NATIONAL WEATHER SERVICE DES MOINES IA 350 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TONIGHT... AT 335 AM...NUMEROUS SHOWERS AND SCATTERED STRONG THUNDERSTORMS CONTINUED OVER THE NORTHERN THREE QUARTERS OF IOWA. MOST OF THE SHOWERS AND STORMS WERE LOCATED NORTH OF A LINE FROM 30 MILES SOUTHEAST OF THE OMAHA/COUNCIL BLUFFS AREA EAST TO 15 MILES NORTH OF BURLINGTON. THE STRONGEST STORMS WERE LOCATED 25 MILES SOUTH OF WATERLOO...NEAR VINTON...35 MILES SOUTHWEST OF DES MOINES...OR 5 MILES SOUTHEAST OF GREENFIELD AND 60 MILES SOUTHWEST OF DES MOINES AT CUMBERLAND. THESE STORMS WILL PRODUCE VERY HEAVY RAIN AND NEARLY CONTINUOUS DEADLY LIGHTNING. ADDITIONAL SHOWERS AND STORMS WERE MOVING BACK INTO THE WEST CENTRAL COUNTIES OF IOWA...BETWEEN SIOUX CITY AND OMAHA/COUNCIL BLUFFS. VERY HEAVY RAINS HAVE ALREADY FALLEN IN THIS AREA SO ANY ADDITIONAL RAINS WILL RESULT IN RAPID RUNOFF INTO AREA RIVERS. OVERNIGHT IT APPEARS THAT THE HEAVIEST RAINS HAVE FALLEN OVER HARRISON... MONONA AND WOODBURY COUNTIES. PEOPLE LIVING IN THIS AREA SHOULD MONITOR THE LATEST RIVER LEVELS AND BE PREPARED TO TAKE APPROPRIATE ACTION IF FLOODING IS OBSERVED. THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 40 MILES AN HOUR. BARLOW
Special weather statement, Jun 16, 4:52 AM CDT, 4 hours 56 minutes before
IAZALL-161030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 445 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TONIGHT... AT 435 AM...NUMEROUS SHOWERS AND WIDELY SCATTERED STRONG THUNDERSTORMS CONTINUED OVER THE NORTHERN THREE QUARTERS OF IOWA. MOST OF THE SHOWERS AND STORMS WERE LOCATED NORTH OF A LINE FROM 10 MILES NORTH OF OMAHA/ COUNCIL BLUFFS SOUTHEAST TO 15 MILES NORTH OF BURLINGTON. THE STRONGEST STORMS WERE NEAR HARLAN...ADAIR...GREENFIELD...JUST WEST OF DES MOINES AND JUST NORTH OF WASHINGTON. HARLAN IS 35 MILES NORTHEAST OF OMAHA/COUNCIL BLUFFS...ADAIR IS 45 MILES WEST OF DES MOINES... GREENFIELD IS 40 MILES SOUTHWEST OF DES MOINES...WHILE WASHINGTON IS ABOUT 30 MILES SOUTH OF CEDAR RAPIDS. VERY HEAVY RAINS AND NEARLY CONTINUOUS DEADLY LIGHTNING WILL OCCUR WITH THESE STORMS. HEAVY RAINS WERE MOVING BACK THROUGH THE NORTHWEST AND NORTHERN SUBURBS OF DES MOINES...STREET FLOODING AND FLOODING OF LOW LYING AREAS IS LIKELY. MOTORISTS ARE ADVISED NOT TO ATTEMPT TO DRIVE THROUGH LOW LYING AREAS WHERE FLOODING IS OCCURRING. THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 35 MILES AN HOUR. BARLOW
Special weather statement, Jun 16, 6:54 AM CDT, 2 hours 54 minutes before
IAZALL-161030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 6 45 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TONIGHT... AT 635 AM...NUMEROUS SHOWERS AND SCATTERED STRONG THUNDERSTORMS CONTINUED IN THE NORTH HALF OF IOWA...AND EXTENDED INTO PARTS OF SOUTH CENTRAL...SOUTHWEST AND EAST CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN CENTRAL IOWA BETWEEN DES MOINES AND ST(ORY CITY...ABOUT 40 MILES NORTH OF DES MOINES...AND IN EAST CENTRAL IOWA ABOUTH 20 MILES SOUTHWEST OF DAVENPORT. THE SHOWERS AND STORMS WERE MOVING EAST AT 35 MILES AN HOUR. SCOTT
Special weather statement, Jun 16, 7:53 AM CDT, 1 hour 55 minutes before
IAZALL-161030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 7 45 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TONIGHT... AT 740 AM...NUMEROUS SHOWERS AND STRONG THUNDERSTORMS CONTINUED IN MOST OF THE NORTHEAST QUARTER OF IOWA...AND EXTENDED INTO PARTS OF CENTRAL IOWA. A FEW SHOWERS WERE ALSO LOCATED IN A NARROW BAND...ABOUT 15 MILES WIDE...EXTENDING FROM SPENCER TO MASON CITY. THE STRONGEST STORMS WERE LOCATED IN CENTRAL IOWA. THESE THUNDERSTORMS EXTENDED FROM CRESTON...ABOUT 35 MILES SOUTHWEST OF DES MOINES...TO GRINNELL...ABOUT 40 MILES NORTHEAST OF DES MOINES. THE SHOWERS AND STORMS WERE MOVING EAST AT 35 MILvES AN HOUR.
Special weather statement, Jun 16, 9:43 AM CDT, 5 minutes before
IAZALL-161530- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 AM CDT SAT JUN 16 1990 ...FLASH FLOOD WATCH FOR THE WESTERN TWO THIRDS OF IOWA TODAY... ...SEVERE THUNDERSTORM WATCH FOR SOUTH CENTRAL AND SOUTHEAST IOWA TILL 11 AM.... AT 940 AM...A NARROW BAND OF THUNDERSTORMS WITH VERY HEAVY RAINS WAS INDICATED FROM SOUTHCENTRAL INTO EAST CENTRAL IOWA. THIS BAND OF STORMS EXTENDED FROM JUST EAST OF CLARINDA...ABOUT 75 MILES SOUTHEAST OF DES MOINES...TO CEDAR RAPIDS. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAINFALLS. NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS WERE ALSO OVER MUCH OF THE REMAINDER OF EAST CENTRAL AND SOUTH CENTRAL IOWA...AN<D SCATTERED PARTS OF WEST CENTRAL AN SOUTHWEST IOWA. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 35 MILES AN HOUR.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 6:13 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 62 min |
| Jun 16, 6:17 AM CDT | Tornado Warning | DMX | Polk | 43 min |
| Jun 16, 6:41 AM CDT | Flash Flood Warning | DMX | Polk | 3 hr |
| Jun 16, 7:12 AM CDT | Tornado Warning | DMX | Jasper | 33 min |
| Jun 16, 7:22 AM CDT | Flash Flood Warning | DMX | Dallas | 4 hr |
| Jun 16, 9:16 AM CDT | Flash Flood Warning | DMX | Marion, Warren | 3 hr |
| Jun 16, 1:36 PM CDT | Flash Flood Warning | DMX | Union | 114 min |
| Jun 16, 1:36 PM CDT | Tornado Warning | DMX | Mahaska | 54 min |
| Jun 16, 1:36 PM CDT | Tornado Warning | DMX | Keokuk, Wapello | 44 min |
| Jun 16, 2:16 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Jefferson, Van Buren | 44 min |
| Jun 16, 4:51 PM CDT | Severe Thunderstorm Warning | DMX | Adair | 39 min |
| Jun 16, 5:15 PM CDT | Severe Thunderstorm Warning | DMX | Madison, Union | 30 min |
| Jun 16, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 26 min |
| Jun 16, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Madison | 26 min |
| Jun 16, 6:16 PM CDT | Severe Thunderstorm Warning | DMX | Clarke | 29 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.