Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 13, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 13, 1990, 2:31 PM CST for Black Hawk County, Iowa. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Mar 13, 1990, 2:31 PM CST (20:31 UTC)
- Expired
- Mar 13, 1990, 3:20 PM CST
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Black Hawk 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
Minneapolis, MN (KSTC), launched 12:00Z, 8.5 hours before the alert went out and 284 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
- 1580 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 343 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 KALO 132031
SVRALO
IAC013-132130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WATERLOO IA
231 PM CST TUE MAR 13 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 330 PM CST FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHEAST PART OF IOWA
BLACK HAWK
AT T225 PM CST WEATHER SERVICE RADAR INDICATED A SEVERE
20 MILES SOUTH OF WATERLOO NEAR THE TOWN OF TRAER.
THE STORM WAS MOVING NORTH AT 40 MPH AND WILL BE EFFECTING
THE TOWNS OF HUDSON AND WATERLOO.
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.
JOHNSONWhat 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.
In the hours before
Special weather statement, Mar 13, 12:54 PM CST, 1 hour 37 minutes before
IAZALL-131930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1253 PM CST TUE MAR 13 1990 ...TORNADO WATCH FOR A LARGE PART OF NORTHERN AND WESTERN IOWA UNTIL 6 PM... ...FLASH FLOOD WATCH FOR THE SOUTH HALF OF IOWA TODAY... AT 1235 AM...A INTENSE THUNDERSTORM WAS LOCATED 70 MILES NORTH OF DES MOINES OR JUST NORTHWEST OF CLARION. LARGE HAIL...VERY HEAVY RAIN AND 35 TO 45 MILE AN HOURS WINDS ARE POSSIBLE WITH THIS STORM. THIS STORM WAS PART OF A LARGE AREA OF SHOWERS AND STORMS MOVING FROM NORTHWEST AND CENTRAL INTO NORTH CENTRAL IOWA. THE AREA WAS 70 MILES WIDE AND IT EXTENDED FROM AMES...25 MILES NORTH OF DES MOINES NORTH TO THE IOWA/MINNESOTA BORDER...40 MILES NKORTHWEST OF MASON CITY. ELSEWHERE SHOWERS AND ISOLATED THUNDERSTORMS WERE BECOMING MORE NUMEROUS OVER PARTS OF SOUTHWEST...SOUTH CENTRAL...EAST CENTRAL AND NORTHEAST IOWA. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR... AS AREAL COVERAGE OVER IOWA WAS INCREASING RAPIDLY. CAB/KS
Special weather statement, Mar 13, 12:58 PM CST, 1 hour 33 minutes before
IAZALL-131930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED NATIONAL WEATHER SERVICE DES MOINES IA 1253 PM CST TUE MAR 13 1990 ...TORNADO WATCH FOR A LARGE PART OF NORTHERN AND WESTERN IOWA UNTIL 6 PM... ...FLASH FLOOD WATCH FOR THE SOUTH HALF OF IOWA TODAY... AT 1235 PM...A INTENSE THUNDERSTORM WAS LOCATED 70 MILES NORTH OF DES MOINES OR JUST NORTHWEST OF CLARION. LARGE HAIL...VERY HEAVY RAIN AND 35 TO 45 MILE AN HOURS WINDS ARE POSSIBLE WITH THIS STORM. THIS STORM WAS PART OF A LARGE AREA OF SHOWERS AND STORMS MOVING FROM NORTHWEST AND CENTRAL INTO NORTH CENTRAL IOWA. THE AREA WAS 70 MILES WIDE AND IT EXTENDED FROM AMES...25 MILES NORTH OF DES MOINES NORTH TO THE IOWA/MINNESOTA BORDER...40 MILES NORTHWEST OF MASON CITY. ELSEWHERE SHOWERS AND ISOLATED THUNDERSTORMS WERE BECOMING MORE NUMEROUS OVER PARTS OF SOUTHWEST...SOUTH CENTRAL...EAST CENTRAL AND NORTHEAST IOWA. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR... AS AREAL COVERAGE OVER IOWA WAS INCREASING RAPIDLY. CAB/KS
Special weather statement, Mar 13, 1:15 PM CST, 1 hour 16 minutes before
IAZALL-132000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 112 PM CST TUE MAR 13 1990 ...TORNADO WATCH FOR A LARGE PART OF NORTHERN AND WESTERN IOWA UNTIL 6 PM... ...FLASH FLOOD WATCH FOR THE SOUTH HALF OF IOWA TODAY... AT 105 PM...SCATTERED SHOWERS AND THUNDERSTORMS WERE LOCATED OVER ALL BUT THE FAR NORTHWEST...FAR NORTHEAST AND FAR SOUTHEAST COUNTIES OF IOWA. THE STRONGEST THUNDERSTORMS WERE LOCATED JUST NORTH OF ELDORA AND BETWEEN IOWA FALLS AND CLARION. ELDORA IS ABOUT 30 MILES SOUTHWEST OF WATERLOO...WHILE CLARION AND IOWA FALLS ARE SOME 35 TO 40 MILES SOUTHWEST THROUGH SOUTH OF MASON CITY. BRIEF VERY HEAVY RAIN...SMALL HAIL AND 30 TO 40 MILE AN HOURS WINDS I.S LIKELY WITH THESE STORMS. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR...WITH A CONTINUED INCREASE IN AREAL COVERAGE OVER IOWA. CAB/KS
Special weather statement, Mar 13, 1:35 PM CST, 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 135 PM CST TUE MAR 13 1990 VERY INTENSE THUNDERSTORMS HAVE CONTINUED TO DEVELOP OVER PARTS OF EAST CENTRAL IOWA. AT 130 PM RADAR INDICATED SEVERAL INTENSE THUNDERSTORMS EXTENDING ACROSS NORTHERN IOWA INTO NORTHERN JOHNSON COUNTIES OF EAST CENTRAL IOWA. THIS IS FROM ABOUT 30 MILES SOUTHWEST OF CEDAR RAPIDS TO THE CORALVILLE RESERVOIR AREA...WHICH IS ABOUT 10 TO 15 MILES SOUTH OF CEDAR RAPIDS. THESE STORMS HAVE THE POTENTIAL TO PRODUCE 1/2 TO 3/4 INCH HAIL AND LOCALLY HEAVY RAINS. THESE STORMS HAVE BEEN MOVING TO THE NORTHEAST AROUND 40 MILES AN HOUR AND WILL ENTER THE SOUTHERN PARTS OF BENTON AND LINN COUNTIES DURING THE NEXBT 1/2 HOUR. ADAMS
Special weather statement, Mar 13, 1:55 PM CST, 36 minutes before
IAZALL-132030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 153 PM CST TUE MAR 13 1990 ...TORNADO WATCH FOR A LARGE PART OF NORTHERN AND WESTERN IOWA UNTIL 6 PM... ...FLASH FLOOD WATCH FOR THE SOUTH HALF OF IOWA TODAY... AT 135 PM...INTENSE THUNDERSTORMS WERE LOCATED OVER WEST CENTRAL... CENTRAL...EAST CENTRAL AND NORTH CENTRAL IOWA. THE STORMS WERE LOCATED NEAR MANILLA...35 MILES NORTHEAST OF OMAHA/COUNCIL BLUFFS...20 MILES SOUTH OF MASON CITY OR JUST WEST OF BELMOND...55 MILES NORTHEAST OF DES MOINES OR JUST WEST OF TAMA/TOLEDO AND ABOUT 10 MILES WEST OF CEDAR RAPIDS. LARGE HAIL...EXTREMELY HEAVY RAIN AND WINDS OF 30 TO 40 MILES AN HOUR IS LIKELY WITH ANY OF THESE STORMS. THESE STORMS WERE PART OF A LARGE AREA OF SCATTERED SHOWERS AND WIDELY SCATTERED THUNDERSTORMS LOCATED OVER ALL BUT THE FAR NORTHWEST... FAR NORTHEAST AND FAR SOUTHEAST COUNTIES OF IOWA. THESE STORMS HAVE SHOWN A TENuDENCY TO DEVELOP RAPIDLY...PRODUCE LARGE HAIL AND THEN DECREASE RAPIDLY IN INTENSITY. THE SHOWERS AND STORMS WERE MOVING NORTH NORTHEAST AT 45 MILES AN HOUR. CAB/KS
Special weather statement, Mar 13, 2:19 PM CST, 12 minutes before
IAZALL-132100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 215 PM CST TUE MAR 13 1990 ...TORNADO WATCH FOR A LARGE PART OF NORTHERN AND WESTERN IOWA UNTIL 6 PM... ...FLASH FLOOD WATCH FOR THE SOUTH HALF OF IOWA TODAY... AT 205 PM...INTENSE THUNDERSTORMS WERE LOCATED OVER WEST CENTRAL AND EAST CENTRAL IOWA. THESE STORMS WERE LOCATED 70 MILES WEST NORTHWEST OF DES MOINES...NEAR CARROLL AND NEAR DINSDALE IN NORTHERN TAMA COUNTY ABOUT 25 MILES SOUTHWEST OF WATERLOO. THESE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...EXTREMELY HEAVY RAIN AND WIND GUSTS OF 30 TO 40 MILES AN HOUR. THESE STORMS WERE PART OF A LARGE AREA OF SCATTERED SHOWERS AND WIDELY SCATTERED THUNDERSTORMS LOCATED OVER ALL BUT THE FAR NORTHWEST...FAR NORTHEAST AND FAR SOUTHEAST COUNTIES OF IOWA. THE SHOWERS AND STORMS WERE MOVING NORTH NORTHEAST AT 45 MILES AN HOUR. CAB/KS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 8:55 PM CST | Severe Thunderstorm Warning | DMX | Madison, Polk | 50 min |
| Mar 12, 11:17 PM CST | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 33 min |
| Mar 12, 11:28 PM CST | Severe Thunderstorm Warning | DMX | Lucas, Wayne | 20 min |
| Mar 12, 11:53 PM CST | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas | 52 min |
| Mar 13, 12:38 PM CST | Severe Thunderstorm Warning | DMX | Wright | 17 min |
| Mar 13, 1:33 PM CST | Severe Thunderstorm Warning | DMX | Poweshiek | 27 min |
| Mar 13, 1:51 PM CST | Severe Thunderstorm Warning | DMX | Tama | 39 min |
| Mar 13, 1:55 PM CST | Severe Thunderstorm Warning | DMX | Carroll | 35 min |
| Mar 13, 2:28 PM CST | Severe Thunderstorm Warning | DMX | Calhoun | 42 min |
| Mar 13, 3:24 PM CST | Severe Thunderstorm Warning | DMX | Davis | 36 min |
| Mar 13, 3:42 PM CST | Tornado Warning | DMX | Davis | 18 min |
| Mar 13, 3:57 PM CST | Tornado Warning | DMX | Jefferson, Van Buren | 33 min |
| Mar 13, 4:18 PM CST | Severe Thunderstorm Warning | DMX | Bremer | 22 min |
| Mar 13, 4:18 PM CST | Severe Thunderstorm Warning | DMX | Chickasaw | 47 min |
| Mar 13, 5:11 PM CST | Severe Thunderstorm Warning | DMX | Washington | 49 min |
| Mar 13, 5:16 PM CST | Severe Thunderstorm Warning | DMX | Johnson | 29 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm 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.